diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index 0df0dd1a68..2a5eac9b7c 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -1018,7 +1018,7 @@ static int imc_decode_frame(AVCodecContext *avctx, void *data,
 
     IMCContext *q = avctx->priv_data;
 
-    LOCAL_ALIGNED_16(uint16_t, buf16, [IMC_BLOCK_SIZE / 2]);
+    LOCAL_ALIGNED_16(uint16_t, buf16, [IMC_BLOCK_SIZE / 2 + FF_INPUT_BUFFER_PADDING_SIZE/2]);
 
     if (buf_size < IMC_BLOCK_SIZE * avctx->channels) {
         av_log(avctx, AV_LOG_ERROR, "frame too small!\n");